Power-transmission mechanism



J. L. MAYS POWER TRANSMISSION MECHANISM.

APPLICATION FILED MAY I1. 1920. 1,404,628. Patented Jan. 24, 1922.

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in v a t 6 2% a 1. L. MAYS. POWER TRANSMISSiDN MECHANISM. APPLICATION FILED mun. 2920.

Patented Jan. 24, 1922.

J. L. MAYS. POWER TRANSMISSION MECHANISM.

A PLICATION FILED MAY 1|, 1920- Paltented Jan. 24,

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Specification six-emi ence; Patented Jan. 24%, 1923.

a imus filed He: 11, me. Serial No. semsee.

Toallwbmnitmayconcem:

Be it known that I, James L. Mara, citizen ot the United States, residing at Dallas, m the county of Dallas and State of Texas, have invented certain new and naefnllmprovements in Power-Transmission amsm; and I do hereby declare the iollowi to be a toll, clear, and exact description i the invention, such as will enable others skilled in the art towhich it appertaine to make and use the same.

This invention. relates to one transmission mechanism eda ted to ransmit uniform motion at redu. speed from a small prime mover, and to conserve energy in so doing. It comprises an o izafion involva-heavy momentum evice adapted to e cot extremal needy and eilicient transmission; and e invention consists in. the general organization and details of construcifically described hereafter and defined m the claims.

In the drawings, Figure 1 is a plan view, partly in horizontal section, of my appa ratus.

Figure 2 is a side elevation thereof, indicating a portion of a frame beam broken awn Figure 3 is a section taken on theline 3-3 of Figure l; looking in the direction of'the arrows.

Fi [re 4 is a detailed sectional view on the line 4-4 of F ignre 1.

Similar reference characters designate corresponding parts throughout the several views.

In the embodiment of the invention disclosed herein, the mechanism is mounted upon a base or foundation 1:. which may be an iron casting of suilicient weight to effectively check vibration. 0n the base casting a, there are, as shown, three pairs destals. The main" pedestals, which prqect from opposite sides of the base substantially midwny of itslength. are deeip noted 1:. At each end of the base are other mlestnls' designated 0 and a. respectively.

.xtending longitudinally of'tlie base cost-V ing 1: art pairs of longitudinal beams or frame burs (I and If. one pair 11 )on each side. The outcr frame bar of one 'pair is (he frunic bur llund the inner one is the frame lmr Ii; The spacing between the frame bars of each pair is loss: than the spnriug lwtu'ceu the pairs or between the two frame burs-4i. These booms or frame boisare tied to that and pro erly spaced b pairs of rod s or bars 0, pro ivided, as show with nuts e on their. extremities, or with heads and nuts, said nuts or heads bai located outside of the outer heme bans 'und serving to 1grevent said outer bars from separatmg. tween the two inner frame bars at, surrounding each pair of rods e, are spacing sleeves f which space the beams or bore :1 from each 0th approach. On each pair of rode a between the frame bars d and d of each p ir are other spacin sleeves g, which space the iramebars and d of each pair and hold them 1n precise and fixed relation to each other. With this construction, when the nuts q are turned urgn the rods 6, the iongitud nal beams or me bars will be held in rigid, fixed relation with each other so as to constitute a'frome which is sustained on the pedestals mentioned.

As thus for described, the base a and the pedestals b, r: and c constitute the fixed part of the sup-port for the mechanism; and the frame comprising the beams d-vl' and spacings bars constitute a movable frame therefor. Associated with the fined part, as shown, is a semicircular, arched bar-k (of which there may be two, if desired), which may be provided with a series of holes h or other catch devices, for a purpose presently to be stated. Projecting from the frame heretofore referred to, comprising the beams or burs ahd tie rods, are members i, one of which may be, as shown, formed on one of the s acing sleeves g. Pwoted on at least one o the projectinrr portions i is u. preferably sprin -pressed it oh it having, as shown, u hand e member adapted to he yres-ied by the thumb or fingers, and. a pin fitted to slide through an opening in. said member i, and engaged in one or another of the orifices h in the semicircular or arched member I: which is mounted on or secured to the fixed frame. Projecting from one or more of the members i are handle members m which diverge ornate oppositely directed, as shown. although it is obvious that our suitable form of handles niuy be used. he longitudinal burs. tie rods, etc, already. described. constitute a movuble frame which su ports the operative mechanism of my mwer tmusmission mechanism, and by means of strong lateral studs it pro jccting from the booms or bars .-I the movable frame is journalled upon benrings 0 on er and preventtheir I central standards 6. It

that the distance fromwill be apparent, therefore, that by seizing one of the handles m or by hooking on to it a fall, the movable framewith all of the gearing supported thereby may be turned about its pivotal support on the central standards, and, by means of the latch and execute bar Inmay be secured at any desired angle between a. horizontal position and a vertical, position, and may be completely reversed. if desired, it being understood that the transverse tie bars and cing sleeves, at thatend of. the apparatus m which the handles and latch m rs project, are so positioned as to rest upon either pair of end --andards c or a, in accordance with 'zhe position of the mechanism. It will be seen by the drawing the pivotal center of the frame to the right-hand end, as shown in Figure 1, is less than 'the distance between said pivotalcenter at; the left-hand end, as shown in said fi re, whereby the short end of the frame w 1 clear the standards at one end when the opposite end of the frame is an rted b the standards at the other end. hen in orizontal position the cross tie members on thelonger end of the frame will rest in cavities p in' one the other of the pairs of the standards c or c.

frame Journalled in the pivoted frame and extendin com letely through the beams or mrs -'and (1; so as to provide projecting portions on at least one side of the frame, are two parallel shafts 1 and 2. The shaft 1 may be considered as the prime power shaft, and may car on its projectlng' end a pulley 3 or otier member by means of which it ma be rotated from some exterior source 0 power, such as o small motor. in the present instance I have shown power applied to the shaft 1 from the nlley 3 by means of a speed multi- 1 'ng, p anetary, beveled tooti gearing. minted concentrically with respect to shaft, but preferably an ported on a hub projecting from some rigi partof the frame mal:

and surrounding the shaft 1 concentrically, is -said pulley 8. This pulley carries a radial shaft 4 upon which are mounted two beveled pinions 5 and 6 at different radial distances from the center of the pulley, the pinion 5 being of larger diameter than the pinion 6. Between the said pinions on said radial shaft is a freely rota-table, conical roller 7. Thesaidradml shaft 4 with its rs 5 and 6 and roller 7 may be'dnplicated, if desired; there may, for example, be four sets spaced 90 apart, mounted within the pulley. I prefer, however, as shown. to e onl one complete set of pinions 5 and 6 wi the intermediate roller 7, and to provide three other symmetrically spaced radial shafts 5 corresponding thereto, each of which carries a conical roller 7' only. Fixed to each frame bar or beam (1 is a said ported in twov sets of ball bearing):

beveled ar 8 having a conical raceway 9,. the said veled pinion 5 engaging-with the teeth of said 'fi xed beveled gear {3, and the conical rollers 7, 7' en ng with said raw way 9. Pinned or, erwise keyed or secured to the end of the shaft 1 is a small bevel gear 10, and with the teeth of said bevel gear 10 the teeth of the pinion 6 mesh. As a reeultof this 'constru' on, when the pulley Bis rotated, mittcd through the pair of beveled iniona 5 and 6 to a beveled ear 10, w ich is fixed to the shaft 1, and the gearclfl will rotate in the same direction es'the pulley 3 at a speed increased ratio of gears adopted. JThe conical rollers traveling u n the racewayof thefixed ear 9 provi e or steady operation, and re nce friction to a minimum. shaft I mounted in hall 1' of a well known type in theouter or beams d, and passing "through holes in the beamed. f

The shaft 1 has secured to' it one or more pinions 1i, preferably two, as shown in Figure 1. These pinions transmit motion from the shaft 1 tothe train ofgearing presently to be described, and as the mechanism is s mmetrical or duplicated upon opposite sid es of the longitudinal center, a description of one side will be suilicient to disclose the construction of the entire mechanism. V

The second shaft 2 is benrin s 20 in the from to said shaft 2 is -a spur beveled gear 22. Rotatably are d, -Ke3*ed gear 21 an a mounted about the axis of shaft 2 is a large spur gear 23,.

of inter osed ball bearing 24. A, long hub 25, ri with the gear 23, pro laterally there I m, embracing the s a 2 and cap the bar or beam d. The said ball. earings may be of any approved and lrnowntype. Secured to the inner side of eachfmme bar (1, concent ic with the shaft 2 is a fixed gear 27 having; a peripheral rowof beveled teeth 28, and an inner raceway 28. Between the said gear 22 and the fixed bevel fiear 27. the said gear 23 is disposed. adinlly jonrnalled within the ar 28 is a beveled pinion 29, said berele pinion 29 meshing with the beveled teeth of the gear 27. which is fixed to the frame bar d, and with the beveled teeth of to the shaft 2 'at 22". Thus, rotation imported to the wheel 23 will cause the shaft 2 to rotate with the gearing shown at twice the angular speed of the gear $5. It is obvious that several piniohe 29 might be used, if desiredvbutl prefer to-use 0 such pinion, and to have a number of r slhigly motion will be theme here supported in hell e I have shown the gear 22. which is keyed mounted, loose, conical roller-s30 angnh I51 ispaced symrhetricallyzfthe surfaces of said i create amininuun amount of resistance. 7'

Eccentric-ally mounted with respect to the shaftQ, is a heat cylindrical, body 40, haw. ing aconcentric orifice 4Q? thrpugh it to permit lhle aassage of the shaft,2, and the hubs of tlie fgears 22. A balltlirust bearing-4:0" is iiiterposed between thefaceof the i 40 and the rear face of the gear 22. The: saltlfbody 40' is recessed concentrically on each face as atlso as ito' adr'nit the gear 23 within the recess and Zperrnit t-l ie result-. mg peripheral ilange' to oi erhanlg' said gear 23. Formedwith, or on gi's eparate annulus secured to the body 40, are inner and outer rows of gear teeth. I have shown the gear "f teeth formed on a separate iii nul'usior ring 54:2,bolted to the body 40; Tlie" outer; un-

nular row of teeth 43 meshes with a pinion 11; The inner rowjof annulauteeth 44 meshes with the teeth of the "gear 23. By this'construction it will be seen, that the body 40 is supported'by the internal teeth 44, engaging the. teeth of the-gear 23,- which is eccentric with respect to said body, and the external teeth 43 engaging theteeth of the pinion 11 and that there are two main points of support at the extremities of a -line between teeth on theinterior gear ring 44 and gear 23, and teeth on'the exterior gear rinp 43 and pinion 11, and that a straight ine drawn between those pointsof support will intersect the-axis Ofshaft 2. Secured to the back of each gear 23 is a shroud ring 45 having-an ,outerperimeter which rolls in contact with the outer wall, 46 of. the cavity, 41 inthe face. of the body 40, thus insuring correct meshing of the teeth 44 with the teeth of gear 23, and preventing any in and out or radial slid ing motion with respect to each other.

In order to assist in holding the body 40 in correct position, I" prefer to journal at pair of rollers 47 on studs 48 projecting from the beam or frame bars cl", So that the perimeters of the said rollers will engage an annular bearing surface 48 inthe ring 42, said rollers being preferably mounte tl i on ball bearings and arranged so as, in cojnjunction with the rolling surfaces between the shroud ring 45 on gear 23 and the body 40, to position said body 40 with absolute precision so that there can be no sliding or grinding of the teeth, other than is incident to their rolling contact.

The ball bearings 26 referred to as mount-f ed in the barsd' tak-e all of the weightof the gear 23. and such of the weight of the body 40 as is imparted to said gear, on the frame bars (L', thus substantially relieving the shaft 2 of the weight of said gear and 'd and d;

body, said shaft 2ca-rrying only the weight of the beveled gears 22 and the spur gears 21. It will be noted also that the ball hear ing 20, which support the shaft 2 in the frame bars at, are seated in bosses formed on t'li eexterior ofsaid frame bars, and that said bosses are-rednced and trued so as to formtlie studs-ethat fit snugly in bearings 0 therefor, as heretofore mentioned, on the central-pedestals b which serve as thepivotal suppoi ts oitliesaid movable frame carrying ody ,tntlltl gearing Th'studs s are preferably by which motion-is transmitted back to the prime shaft 1 must obviously be made such thatthfinalgear on the shaft l in this return train will be driven thereby at precisely the'sanie angular speed as that at which the shaft 1 is initially driven. This return train will now be described.

Between 'the prime' shaft 1 and second shaft 2, andpparallel therewith, extending between each all of beams or frame bars 0! and cl, 1S pre erably a studshaft 51 carrying an idler52. The said idler 52 meshes with the gear- 21" and'withn gear 53 which is mounted on a stud shaft 54 parallel with the stud shaft 51 and extending between beams Mounted concentrically with respect to said last named stud, is a fixed beve ed ear 55 shown as bolted to a beam a. This eveled gear 55 is constructed similarly to the corresponding fixed gears previously described, having an external annular row of beveled gear teeth, and within that It conical raceway; Mounted loosely with respect to and concentric with said stud 54 is a beveled gear 56 of the 'sametsize as said beveled gear 55, and similarly. constructed. The hub of the said spur ear 53 is mounted on ball bearings encirc ing said stud 54, and so also is the described beveled gear 56 which is loose upon said stud. The described spur gear 53 ismount d between the fixed gear 55 secured .torthe frame (I and the said loose beveled gear 56. The said spur gear 53 can ries a radially mounted, beveled pinion 57, which meshes with the beveled teeth of both the fixed geauand the relatively rotary gear concentric therewith. As in other gear sets described, there may be a plurality of such beveled pinions, but I pref r to space symmetrically within said spur gear a plurality of conical rollers 58 adapted to engage raceways. It will be seen that the unit gen 1 set just described, mounted on the said stud 5-1, constitutes a planetary gear set that tltt'lll'llplishes a reduction of speed as applied to the said loose beveled gear 56. Integral with or secured to said loose beveled gear a nex ternal gear ring or series of spur gear teeth 59. Mounted concentrically upontheshaft 1 is a spur gear (50, carrying preferably a plu-t as to rotate therewith, is a-bevel'edxgear-fid Between thesaid gear 62 fixed to theqframe bar d and the said gear 63 fixed to the-shaft- 1 the said sppr gear 60 is mounted toi'otate.

' he teeth-of the spur gear 60 are ih'meshwith the teeth of the spurring 59 on the said heveledgear '56,'and as the said gear'56 ro tates, it rotates the-spur gear 60, and motion will thereby beti'afismitted to the beveled gear 63, and theiethrough to thejshaft 1, the ratios of the several gears between the gear ring 44 and the gear figbeing such that the said gear 63 has imparted to itby thereverse train precisely the angular eed that was imparted to the shaft 1 by t e initial driving motion of the pulley 3. It will thus be'seen that there is, as it were, a closed mechanical circuit beginning with the shaft 1, and therefrom transmitted to the shaft2, and back again to said shaft 1, so that the said gearing holds the said two main shafts in exact responsive speed relations It will be seen that this mechiinistn asa. whole may be so manigulated as to place it at any convenient ange of operation, and that when erected into the, perpendicular pa sition, all weight of the heavybody 4O tending to shear the teeth, is removed from the ear teeth, and that the heavy body 40 will hen be suspended substantially by tl'iegrollers 47 sustained on strong studs pro ecting from the frame bars d. ssu'm ng that the apparatus is to be driven by a belt, the belt may be tightened by shifting the position of the frame. It may be adapted to confined spaces by reason of the changes of positlon of whichit issusceptible-j Having described my invention in the best form now known to me, what I claim and desire to secureby Letters Patentiof the United States is: v

i 1. In power transmitting mechanism, a frame, a bevel gear fixed thereto having1 on one face an annular row of bevel teet a smaller bevel gear coaxial with said fixed gear and having a row of bevel teeth facing the said fixed gear, a wheel journalled-between said bevel gears cor :ially with respect to them, a radial shaft "ournalled in said wheel, a bevel pinion fixe to the outer end of said shaft and arranged to engage the bevel teeth of the larger fixed gear, a

bevel pinion fixed to the inner end of said radial shaft and engaging the smaller and rotatable bevel gear.

2. Th mower transmitting mechanism,:a

sea

frame, a bevel gearifixed thereto havin on one face an annular row of bevel teet and a raceway concentric with and of a.

different diameter than the annular row of teeth, a second bevel g'ear coaxial with said ,fixed gear. and having a row of bevel teeth facing said fixed gear, a wheel, jour'nalled betweensaid bevel ears coaxiallyv with re spect to them, a 1' 'al shaft 'ournalled in end of saidshaft and arranged to engage the bevelteethof the fixed gear, a bevel pinion fixed to the inner end of said radial rollers: radia ly pivoted in said wheel, an arran'lged to bear upon said raceway. 3. '11 power transmitting mechanism, a frame, a beveligearfixed thereto, a rotatable bevel gear of diflferent pitch diameter coaxialwith said fixed gear and facing it,'a

said wlieel, a bevel pinion fixe to the outershaft; and an aging the rotatable bevel gear .wheelihounted between said gears coaxial therewith, a radial shaft journalled in said wheel, two bevel pinions thereon, one of which e' g3 5S v the teeth of the fixed bevel 'gear and the other the teeth of the rotatablebevel gear, a raceway 0n the face of the hired ear, and a roller radially .pivoted on the said wheel and bearing upon said racewa, ,said roller being radially spaced from t e center so as to describe a path between the paths described by said bevel pinions.

4.1m power transmitting mechanism, a-

frame, al' rime she-ft and a second shaft parallel with each other, journalled in said frame, a pinion fixed to the prime shaft, a gear havingcxternal teeth concentric with the, second shaft and adapted to drive it, asymmetrical heavy c. lindrical body, disposed eccentrically witii respect to theaxis of said second shaft, said cylindrical body having an external annular row of gear teeth ada ted to, mesh with .said pinion fixed to tii annular row of gear teeth ada ted to mesh with said gear concentric wit the second shaft. I

' 5. In. power transmitting mechanism, a frame,. a prime-1 shaft and a. second shaft journalled in said frame parallel with the prime shaft, a shaft, an externa ly toothed gear mounted concentrically with respect to said second shaft and means whereby rotation of the gear willdrive said second shaft, a symeprime shaft, and an internal annular inion fixed to the prime rao and the externally toothed gear concentric with said second shaft and means for preventing said cylindrical body from moving laterally out of engagement with said pinion and externally toothed gear.

6. In powertransmittingmechanism, a frame, a prime Shaft and a seermdshaft;i

said second shaft said shrouds providing 7.

- rolling surfaces adapted to engage in the shaft.

pitch circumferences ofthe internal ear and said gear concentric with the second 7. In power transmitting mechanism, a frame, a prime shaft and a second shaft mounted in said frame parallel with each.

other, a inion fixed to the prime shaft, a gear having external teeth concentric with said second shaft and adapted to drive it, a symmetrical heavy cylindrical body dis posed eccentrically with respect to the axis of said second shaft, said cylindrical body having an external annular row of gear teeth adapted to mesh with said pinions fixed to the prime shaft, and an internal annular row, of gear teeth adapted to mesh with said gear concentric with said second shaft, shrouds on said eccentrieally disposed body and on said gear concentric with the second shaft said shrouds providing rolling surfaces in the pitch circumferences of said internal gear and said gear concentrio with the second shaft, and rollers journalled in the frame and bearingagainst the internal circumferential wall of the cylindrical body at points diametrically opposite to the points of ressure of the gear shrouds to maintain said cylindrical body in accurate adjustment.

8. In power transmission mechanism, a frame, an externally toothed gear wheel having a hub bearing in said frame, a shaft passing loosely through said hub and journalled in the frame, an internally toothed gear eccentric to said shaft engaging said externally toothed gear, and means whereby said externally toothed gear is connected to said shaft to rotate it.

9. In power transmititing mechanism, a frame, an externally toothed gear wheel having a hub bearing in said frame, a shaft passing loosely through said hub and journalled in the frame, an internally toothd gear eccentric to said shaft engaging said externally toothed gear, a bevel gear secirred to said shaft, and a bevel gear concentric therewith secured to the frame, is bevel pinion radially journa'lled in said externally toothed gear, and meshing" with the teeth of saidbevel gears, and a-wheel fixed-tosaid shaft adapted to transmit motiontherefiomi i 10. In power transmission mechanismi a frame, a prime shaft, an externally tootfi'eii g'ear rotatably mounted on an axis parallel with and substantially in the same'horiz'orrtal plane aS said prune shaft, and a first gear train for driving said externally toothed gear comprising a pinion fixed to said prime shaft, a heavy cylindrical body,

disposed eccentrically with res ect to the axis of said'externally toothe gear, said cylindrical body having an external rowa'of teeth meshing with said pinion fixed to the prime shaft, and an internal annular row of teeth meshing with said externally toothed gear, and a second transmission train between said externally, toothed gear and the prime shaft so proportioned as to transmit motion at precisely the same ratio as said first train. i

11. In power transmission mechanism, a frame pivoted on a horizontal axis, means whereby said frame may be adjusted about said axis, a prime shaft journaled horizontally in said frame, a pinion fixed to said prime shaft, an externally toothed gear pivoted to said frame on an axis parallel with the prime shaft, a heavy cylindrical body mounted eccentrically with respect to said externally toothed gear, said cylindrical body having an external row of gear teeth meshing wlth said pinion and an internal row of teeth meshing with said externally toothed gear, said body being sustained by said pinion and said externall toothed gear, means to prevent radial slid ing movementof said bod with respect to said gear and pinion, an a seconditransmission train between said prime shaft and said externally toothed gear.

12. In power transmission mechanism, a frame comprising two pairs of parallel spaced beams, a prime shaft and a: second shaft parallel thereto, journalledl j-tians versely in said beams, central driving conneotions between'said shafts comprising a pinion fixed to said prime shaft and an external gear concentric with said second shaft between said two pairs of beams, driving connections between said external gear and said second shaft, :1 heavy cylindrical body mounted cccentrically with respect to said external gear, having an external driving (Olll'lRCtlOfl with said pinion and an internal driving connection with said external gent, said body being disposed between said pairs of beams, and other driving trains similar to each ether diggosed between the beams (if each pair, and apted to transmit motion between the prime'shaft and the sec: 'clid'shaft at precisely the same ratio as the 5 said train disposed between the two pairs of 13.;In a power transmission mechanism, a s 1 1gport,'en angulailyedjustabie frame pro axisjeurnaled in said sup ort, e p'rime shaft jeweled in said adjusm 1e frame, apinion fixed to said prime sha t, a shaft journalled d1; axis eccentric to said hubs and par- $111.6! with'said prime shaft, an externellzt 15 toothed gear to rotate said she that is eccentric with said hubs a. heavy ediwith elined hubs'having ehorizontal cylindrical body coaxial with said hubs and surroundin said eccentric shaft, said heavy I cylindricei' bcdy havin an annular row-*of externaigear teeth an an annular row of -20 internel'geer teeth, the external row of gee:- teeth ineshi with the pinion on the shaft, and e internal aw meshilf with the pf 'sgid' extemeiiy v and a second train betweeIi-saidpi'ime 5 hit and said sheft eccentric to the hubs, said second train being adapted i-tctrens nit metion between said shaft at the same retio as said first described train.

In testimony whereof I aflix my -signeture. 30

JAMES L. MAYS. 

